Telescoping multistep reactions The synthesis of fine chemicals sometimes requires multiple reactions and tedious work-up between each step is often necessary. Purification may involve the addition of a quenching reagent, multiple aqueous and organic extractions, the addition of a drying agent, filtration, evaporation, and further purification by chromatog […]

Heterogeneous catalysis and catalyst recycling Heterogeneous catalysis is a type of catalysis in which the catalyst occupies a different phase from the reactants and products. This may refer to the physical phase — solid, liquid or gas — but also to immiscible fluids. Heterogeneous catalysts can be more easily recycled than homogeneous, but characterizat […]

Safe, small scale access to supercritical fluids The ability to safely access high temperatures and pressures in flow reactors has implications not only on the rate of chemical reactions, but also on the types of solvents one can use. Many greensolvents such as methanol and acetone have boiling points too low for certain batch applications, whereas performin […]

the isolated cyclopentenedione derivative may have structure 1a or 1b or even exist as an equilibrium mixture between these two enol forms showing average 1H and 13C NMR spectra due to a proposed rapid interconversion between 1a and 1b. http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000300024 Synthetic results Our approach to cycl […]

The Swern oxidation, named after Daniel Swern, is a chemical reaction whereby a primary or secondary alcohol is oxidized to an aldehyde or ketone using oxalyl chloride,dimethyl sulfoxide (DMSO) and an organic base, such as triethylamine.The reaction is known for its mild character and wide tolerance of functional groups. The by-products are dimethyl sulfide […]

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